<template>
  <div class="todo-container">
    <div class="todo-wrap">
      <Header @addList="addList" />
      <List
        :todoList="todoList"
        @changeListType="changeListType"
        @deletecompleted="deletecompleted"
      />
      <Footer
        :todoList="todoList"
        @allCheckedhandel="allCheckedhandel"
        @deleteAllcompleted="deleteAllcompleted"
      />
    </div>
  </div>
</template>


<script>

import Header from "./components/Header";
import List from "./components/List";
import Footer from "./components/Footer";

export default {
  data() {
    return {
      todoList: [],
    };
  },
  mounted(){
    this.todoList=JSON.parse(localStorage.getItem("todoList")||"[]")
  },
  watch:{
    todoList:{
      deep:true,
      handler(todoList){
        localStorage.setItem("todoList",JSON.stringify(todoList))
      }
    }
  },
  components: {
    Header,
    List,
    Footer,
  },
  methods: {
    addList(todo) {
      //添加新的todo
      this.todoList.unshift(todo);
    },
    //修改done
    changeListType(id) {
      this.todoList = this.todoList.map((item) =>
        item.id === id ? { ...item, done: !item.done } : item
      );
    },
    //删除已完成任务
    deletecompleted(id) {
      //删除确认判断
      let isDelete = confirm("确定删除吗?");
      if (!isDelete) return;

      this.todoList = this.todoList.filter((item) => {
        return item.id !== id;
      });
    },
    //任务全选和取消全选
    allCheckedhandel(value) {
      this.todoList = this.todoList.map((item) => ({
        ...item,
        done: value,
      }));
    },
    //清除所有已选任务
    deleteAllcompleted() {
      //删除确认判断
      let isDelete = confirm("确定删除吗?");
      if (!isDelete) return;

    return this.todoList= this.todoList.filter(item=>!item.done)
    },
  },
};
</script>

<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>